Smoke-consuming furnace



(No Model.)

G. K. GEIGER, W. D. MGKENZIE 85 G. L. CROSS.

SMOKE GONSUMING FURNAGE.

Patented June 9, 1891.

GEO/Pc A'. 64/66 D I /femne: 1% &ROME L Caesar,

Dave/%271733 UNrrED STATES PATENT OFFICE.

GEORG KARL GEIGER, ILLIAM MCKENZIE, AND GEROME L. CROSS, OF SPRINGFIELD, MASSACHUSETTS.

SMOKE-CONSUMING FURNACE.

SPECIFICATION formng part of Letters Patent No. 453,805, dated June 9, 1891.

Application filed July 5, 1890. Serial No. 357,!)14. (No model.)

To (LZZ whom it may concern:

Be it known that we, GEORG KARL GEIGER, WILLIAM D. MCKENZIE, and GEROME L. CROSS, citizens of the United States, all residing at Springfield,in the county of llampden and State of Massaehusetts, have invented new and useful Im provements in Smoke-Consuming Furnaces, of which the following is a specifieation.

This invention relates to improved means which are applied in relation to asteam-boiler or other furnace for insuring the most complete combustion of the fuel therein burned and a Consumption of the smoke.

The invention consists in the construction and eombination of parts or instrumentalities as considered in relation to themselves and to the furnace for operation and effect, all substantially as will be hereinafter fully described, and pointed out in the claim.

Referring to the accompanying drawings, in which this invention is illustrated,Figure l is a sectional elevation longitudinally of a steam-boiler furnace of ordinary Construction, and also showing the improved combustion-perfeeting means. Fig. 2 is a rear elevation and cross-section of the same on or about the plane indicated by the line 2 2, Fg. 1.

The bridge-wall is formed step-shaped at its upper forward p0rtion,as shown in Fig. 1, and behind the rising portion of the bridgewall is set a box A, of cast-iron or other suitable metal or material, which extends entirely across said bridge-wall from side to side of the furnace-chamber, and said box is closed, except as to the nutiplicity of perforations oc in its top. lVe provide one or more air-pipes B, which pass horizontally from the front of the furnace through the ash-pit and under the bridge-wall and combustion-chamber at the rear thereof, and eachair-pipe is thenoe projected upwardly within the rear of the combustion-chamber, as at a, and in one or several return-bends, as shown at Z). Considerable sections or lengths of the air-pipes are also disposed at the rear of said combustionehamber, and then each pipe continues forwardly through the space in the combustionchamber to communicate with the said box A.

The end of each air-pipe B is provided outside of the furnace-front with a properly-defiected f u nn el (I, wlereby the ai r-currents may be most effectively directed into the said pipe, and, as plain, the air passing rearwardly, reaching in a more or less heated state the Vertically-disposed sections of the pipe, circulates therein and becomes heated in a high degree and is thence forced into the said box A, to issue in jets at the perforations at the top of the bridge-wal and, so issuing, pure heated air commingling with the products of combustion at the bridge-wall conduces, in eonjunction with the products of combustion, to the generation of such a gas as may be nearly all consumed, and thereby an increased effective heat from a given quantity of fuel is seeured, and there will be a correspondingly less proportion of smoke.

The course of the pipe at the rear of the combustion-chamberis devoidof sharp angles, whereby the easy passage of air through the fnrnace is assured, and there is provided at the rear central part of the box A a handopeningf, which is adapted to be closed by the hinged cover g. Dust, ashes, or soot which may collect in the said box may be readily removed, and the pipes B may also be cleared by foroing through them stean or air under pressure, which may be entered at the front of the furnace through any suitable hose-pipe or other conduit, taking stean from the boiler or air from any blower or air-conpressor. The said funnels (Z (Z for the outer ends of the air-pipes B at the front of the furnace are coupled to the pipes, as indicated by dotted lines in Fig. 2,so that the said outwardly-fiaring funncl extremities of the airpipes B B may have a direction generally upwardly or downwardly and toward either side of the furnace. This provision is deemed of much importance in the practical utilization of the smoke-consuming furnaee, for it will be apparent that under the burning of various kinds of coal different volumes of heat-ed air are necessarily to be supplied to effectthe most perfect smoke-consuming results, and therefore when a class of coal is being burned, in connection with which a lesser quantity of the highly-heated air is to be supplied than might be necessary at the time of burning another kind or grade of coal, by properly turning the funncl extremity or mouth of the air- IOO 2 V &53,805

pipeB, or, in other words, by turning such funnel-nouth away froni the greatest air current s or drafts in the boiler-roon, there Will be a decreased current of air entered to the said airsupply pipe, and thence to the box at the bridge-wall. i

It will be especially noted that the pipes after passing through the ash-pit and under the bridge-wall, and then having by their return-bends a disposition in the rear of the combustion-chanber, enter the cast-iron box A at the ends thereof, so that there will be such a hot-air draft in and through the box as to force the scot which may collect toward the end of the box near or to the middle thereof, so that t may most easily be with` drawn at the centrally-disposed hand-opening. By *setting the said box behind the bridge-wall the box is protected from the destructive action of the usually more or less wet flane at the grate, the pipes B being also protected from such heat action by being carried under the grate.

Having fullydescribed our nvention, what we claim, and desire to secure by Letters Patent, is-

In a smoke-consuning furnace, the combi-' nation,with a bridge-wall provided at its forward portion with the guard-riser and the hollow metallic box located at the top of the bridge-wall behind said guard-riser and having the perforated top and centrally of its rear sidethe hand-opening and closure there- 'for, and the combustion-chanber at the rear of the bridge-Wall entirely closed, of two pipes passing rearwardly from the front and at each side of the furnace through the ash-pit and under the bridge-wall and having the return bent sections disposed the one upon the other in the rear of the closed conbustion-chamber and thence forwardly extended to a communication with the said box near the ends thereof and the said pipes at their ends at the front of the furnace provided With funnels outwardly fiaring, the aXes of' which are angnlar to the pipes', and said funnels being adjustable on said pipes, all substantially as shown and described, and for the purposes set t'orth.

GEORG KARL GEIGER. WILL'IAH D. MGKENZIE; GEROME L. CROSS,

Witnesses:

WM. S. BELLoW-s, J. D. GARFIELD. 

